{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:32:05Z","timestamp":1760236325338,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2021,11,12]],"date-time":"2021-11-12T00:00:00Z","timestamp":1636675200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000006","name":"Office of Naval Research","doi-asserted-by":"publisher","award":["N00014-17-1-2197"],"award-info":[{"award-number":["N00014-17-1-2197"]}],"id":[{"id":"10.13039\/100000006","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Norwegian spring-spawning herring are a critical economic resource for multiple nations in the North Atlantic and a keystone species of the Nordic Seas ecosystem. Given the wide areas that the herring occupy, it is difficult to accurately measure the population size and spatial distribution. Ocean Acoustic Waveguide Remote Sensing (OAWRS) was used to instantaneously measure the areal population density of Norwegian herring over more than one thousand square kilometers in spawning grounds near \u00c5lesund, Norway. In the vicinity of the \u00c5lesund trench near peak spawning, significant attenuation in signal-to-noise ratio and mean sensing range was observed after nautical sunset that had not been observed in previous OAWRS surveys in the Nordic Seas or in other regions. We show that this range-dependent decay along a given propagation path was caused by attenuation through dense herring shoals forming at sunset and persisting through the evening for transmissions near the swimbladder resonance peak. OAWRS transmissions are corrected for attenuation in a manner consistent with waveguide scattering theory and simultaneous downward directed local line-transect measurements in the region in order to produce instantaneous wide-area population density maps. Corresponding measured reductions in the median sensing range over the azimuth before ambient noise limitation are shown to be theoretically predictable from waveguide scattering theory and observed population densities. Spatial-temporal inhomogeneities in wide-area herring distributions seen synoptically in OAWRS imagery show that standard sparsely spaced line-transect surveys through this region during spawning can lead to large errors in the estimated population due to spatial and temporal undersampling.<\/jats:p>","DOI":"10.3390\/rs13224546","type":"journal-article","created":{"date-parts":[[2021,11,14]],"date-time":"2021-11-14T20:51:53Z","timestamp":1636923113000},"page":"4546","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Quantification of Wide-Area Norwegian Spring-Spawning Herring Population Density with Ocean Acoustic Waveguide Remote Sensing (OAWRS)"],"prefix":"10.3390","volume":"13","author":[{"given":"Daniel","family":"Duane","sequence":"first","affiliation":[{"name":"Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA"}]},{"given":"Olav Rune","family":"God\u00f8","sequence":"additional","affiliation":[{"name":"Institute of Marine Research, Post Office Box 1870, Nordnes, N-5817 Bergen, Norway"}]},{"given":"Nicholas C.","family":"Makris","sequence":"additional","affiliation":[{"name":"Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,12]]},"reference":[{"key":"ref_1","unstructured":"Marine Stewardship Council (2021, August 18). International Action Needed on Herring and Blue Whiting Stocks. Available online: https:\/\/www.msc.org\/media-centre\/news-opinion\/news\/2020\/12\/04\/international-action-needed-on-herring-and-blue-whiting-stocks."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"525","DOI":"10.1111\/faf.12084","article-title":"A Collective Navigation Hypothesis for Homeward Migration in Anadromous Salmonids","volume":"17","author":"Berdahl","year":"2016","journal-title":"Fish Fish."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1016\/j.fishres.2012.02.027","article-title":"Fisheries Applications of Remote Sensing: An Overview","volume":"148","author":"Klemas","year":"2013","journal-title":"Fish. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1734","DOI":"10.1126\/science.1169441","article-title":"Critical population density triggers rapid formation of vast oceanic fish shoals","volume":"323","author":"Makris","year":"2009","journal-title":"Science"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"660","DOI":"10.1126\/science.1121756","article-title":"Fish population and behavior revealed by instantaneous continental shelf-scale imaging","volume":"311","author":"Makris","year":"2006","journal-title":"Science"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"137","DOI":"10.3354\/meps08266","article-title":"Ocean Acoustics Waveguide Remote Sensing (OAWRS) of marine ecosystems","volume":"395","author":"Jagannathan","year":"2009","journal-title":"Mar. Ecol. Prog. Ser."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"104","DOI":"10.1121\/1.3268595","article-title":"Low-frequency target strength and abundance of shoaling Atlantic herring (Clupea harengus) in the Gulf of Maine during the Ocean Acoustic Waveguide Remote Sensing 2006 Experiment","volume":"127","author":"Gong","year":"2010","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1253","DOI":"10.1121\/1.3614542","article-title":"Effects of multiple scattering, attenuation, and dispersion in waveguide sensing of fish","volume":"130","author":"Andrews","year":"2011","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Yi, D.H., Gong, Z., Jech, J.M., Ratilal, P., and Makris, N.C. (2018). Instantaneous 3D continental-shelf scale imaging of oceanic fish by multi-spectral resonance sensing reveals group behavior during spawning migration. Remote Sens., 10.","DOI":"10.3390\/rs10010108"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1111\/faf.12331","article-title":"Instantaneous areal population density estimation of entire Atlantic cod and herring spawning groups and group size distribution relative to total spawning population","volume":"20","author":"Makris","year":"2018","journal-title":"Fish Fish."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"366","DOI":"10.1038\/nature16960","article-title":"Vast assembly of vocal marine mammals from diverse species on fish spawning ground","volume":"531","author":"Wang","year":"2016","journal-title":"Nature"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Duane, D., Cho, B., Jain, A.D., God\u00f8, O.R., and Makris, N.C. (2019). The Effect of Attenuation from Fish Shoals on Long-Range, Wide-Area Acoustic Sensing. Remote Sens., 11.","DOI":"10.3390\/rs11212464"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3532","DOI":"10.1121\/1.1993087","article-title":"Mean and covariance of the forward field propagated through a stratified ocean waveguide with three-dimensional random inhomogeneities","volume":"118","author":"Ratilal","year":"2004","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2012","DOI":"10.1364\/OL.20.002012","article-title":"A foundation for logarithmic measures of fluctuating intensity in pattern recognition","volume":"20","author":"Makris","year":"1995","journal-title":"Opt. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"769","DOI":"10.1121\/1.416239","article-title":"The effect of saturated transmission scintillation on ocean acoustic intensity measurements","volume":"100","author":"Makris","year":"1996","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Wang, D., and Ratilal, P. (2017). Angular resolution enhancement provided by nonuniformly-spaced linear hydrophone arrays in ocean acoustic waveguide remote sensing. Remote Sens., 9.","DOI":"10.3390\/rs9101036"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1988","DOI":"10.1121\/1.384439","article-title":"Spatial correlation of surface generated noise in a stratified ocean","volume":"67","author":"Kuperman","year":"1980","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1121\/1.3037228","article-title":"Empirical dependence of acoustic transmission scintillation statistics on bandwidth, frequency, and range in New Jersey continental shelf","volume":"125","author":"Andrews","year":"2009","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"858","DOI":"10.1121\/1.1913401","article-title":"Measurements of mode attenuation coefficients in shallow water","volume":"53","author":"Ingenito","year":"1973","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"717","DOI":"10.1093\/icesjms\/fsw180","article-title":"Herring submesoscale dynamics through a major spawning wave: Duration, abundance fluctuation, distribution, and schooling","volume":"74","author":"Skaret","year":"2017","journal-title":"ICES J. Mar. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Yi, D.H., and Makris, N.C. (2016). Feasibility of Acoustic Remote Sensing of Large Herring Shoals and Seafloor by Baleen Whales. Remote Sens., 8.","DOI":"10.3390\/rs8090693"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"2239","DOI":"10.1098\/rsbl.2004.0208","article-title":"Beaked whales echolocate on prey","volume":"271","author":"Johnson","year":"2004","journal-title":"Proc. Biol. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1736","DOI":"10.1121\/1.406739","article-title":"A split-step Pad\u00e9 solution for the parabolic equation method","volume":"93","author":"Collins","year":"1993","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1121\/1.1912133","article-title":"Statistics of Sound Propagation in the Ocean","volume":"48","author":"Dyer","year":"1970","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_25","unstructured":"Chen, T. (2009). Mean, Variance, and Temporal Coherence of the 3d Acoustic Field Forward Propagated through Random Inhomogeneities in Continental-Shelf and Deep Ocean Waveguides. [Ph.D. Thesis, Massachusetts Institute of Technology]."},{"key":"ref_26","first-page":"108","article-title":"Gas secretion and resorption in the swimbladder of the cod (Gadus morhua)","volume":"10","author":"Jones","year":"2018","journal-title":"J. Comp. Physiol."},{"key":"ref_27","unstructured":"Albers, V.M. (1967). Sound propagation in the presence of bladder fish. Underwater Acoustics, Plenum Press."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1016\/S1054-3139(03)00031-6","article-title":"An expanded target-strength relationship for herring","volume":"60","author":"Ona","year":"2003","journal-title":"ICES J. Mar. Sci."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/22\/4546\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:29:05Z","timestamp":1760167745000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/22\/4546"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,11,12]]},"references-count":28,"journal-issue":{"issue":"22","published-online":{"date-parts":[[2021,11]]}},"alternative-id":["rs13224546"],"URL":"https:\/\/doi.org\/10.3390\/rs13224546","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2021,11,12]]}}}